CN108300937A - A kind of steel ingot and its processing technology - Google Patents
A kind of steel ingot and its processing technology Download PDFInfo
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- CN108300937A CN108300937A CN201810054691.1A CN201810054691A CN108300937A CN 108300937 A CN108300937 A CN 108300937A CN 201810054691 A CN201810054691 A CN 201810054691A CN 108300937 A CN108300937 A CN 108300937A
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- tundish
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of steel ingot and its processing technology, the mass percent of each main alloy element is in the chemical composition of the steel ingot：C is 0.42~0.50%, Si is that 0.18~0.35%, Mn is 0.60~0.80%, Cr≤0.25%, P≤0.025%, S≤0.025%, Ni≤0.25%, Cu≤0.25%, surplus is Fe, the hardness of the steel ingot that the present invention obtains from the inside to the outside is than more uniform, and the heat-treated sturcture conversion in processing technology is relatively simple, and metallographic structure is finer and smoother uniformly；More prominent advantage is that material core structure is fine and close, and its surface toughness and center toughness deviation are minimum, and the utility value finished is big；In addition, the process-cycle shortens, cost reduction.
Description
Technical field
The present invention relates to steel alloy processing technique fields, more particularly, to a kind of steel ingot and its processing technology.
Background technology
Continuous casting is the abbreviation of continuous casting steel machine.Steel plant produce all kinds of steel products during, using solidification of molten steel at
There are two types of methods for type：Traditional die casting and Continuous Casting Under.And the company occurred in American-European countries in nineteen fifties
Casting technology is an advanced technology the direct castable of molten steel.Compared with conventional method, continuous casting technology, which has, to be greatly improved
Recovery rate of iron and slab quality, energy saving equal significant advantages.
Such as the utility model patent of Publication No. CN206527325U discloses a kind of billet caster, including ladle,
Tundish, crystallizer, supporting roller channel, spray equipment and withdrawal straightening machine, wherein the withdrawal straightening machine is the single chassis straightening of press function
The horizontal segment in the billet caster is arranged in machine.Single chassis withdrawal straightening machine is arranged in horizontal segment in the billet caster, can
It is safeguarded with being individually replaced, when producing the small billet of different steel grades, the pressure of different drafts is carried out using different withdrawal straightening machines, it can be with
Meets the needs of different steel grade different castings and different drafts.
But in processing procedure, more impurity is contained in raw material, is easy to the later stage if not at early period
Product impacts, for example, surface toughness and center toughness deviation it is larger, cause to be unfavorable for the later stage and continue to process.
Invention content
In view of the deficienciess of the prior art, an object of the present disclosure is to provide a kind of steel ingot, it can process and be contained
The steel ingot that impurity level is low, surface toughness and center toughness deviation are minimum.
To achieve the above object, the present invention provides following technical solutions：A kind of steel ingot, in the chemical composition of the steel billet
The mass percent of each main alloy element is：C be 0.42~0.50%, Si be 0.18~0.35%, Mn be 0.60~
0.80%, Cr≤0.25%, P≤0.025%, S≤0.025%, Ni≤0.25%, Cu≤0.25%, surplus Fe.
The present invention is further, and the mass percent of each main alloy element is in the chemical composition of the steel ingot：C is
0.45%, Si 0.25%, Mn 0.70%, Cr 0.25%, P≤0.020%, S≤0.020%, Ni 0.20%, Cu are
0.15%, surplus Fe.
By using above-mentioned technical proposal, obtained steel ingot has higher polishing performance and processing performance.
The present invention second is designed to provide a kind of processing technology, can process to obtain surface toughness and center toughness deviation
Minimum steel ingot.
To achieve the above object, the present invention provides following technical solutions：A kind of processing technology of steel ingot, the technique include
Following steps：Step S1, iron compound raw material is melted in electric furnace, opens the slide gate nozzle of ladle bottom in electric furnace；Step S2, steel
Liquid flows into tundish from ladle；Step S3, the cunning of tundish bottom is opened when the molten steel face in tundish reach a certain height
The dynamic mouth of a river, and molten steel is made to be flowed into the LF furnace refinings containing synthesis slag charge and deoxidier, under reducing atmosphere, lead to
Electrode submerged arc slag making is crossed, the processing of desulfurization, the deoxidation of molten steel is completed；Step S4, the slide gate nozzle of LF stoves is opened, again by molten steel
It is transferred to intermediate ladle and carries out Slag treatment；Step S5, molten steel is flowed into the crystallizer of Forced water cooling；Step S6, work as crystallizer
When interior molten steel face reach a certain height and molten steel surrounding has been frozen into certain thickness green shell；Step S7, start straightening
Machine is bitten dummy bar and is moved down, because molten steel coheres together therefore molten steel is drawn out crystallizer with dummy bar；Step S8, steel billet enters
Two cold-zones, because the very thin inside of green shell is molten steel therefore water-spraying control；Step S9, enter withdrawal straightening machine, the effect of withdrawal straightening machine along roller-way
It is to stretch continuous casting billet, in order to the progress of the next step；Step S10, the steel billet solidified completely is cut into required length through aligning
Degree.
Through the above technical solutions, after the molten steel in ladle is transferred in tundish, impurity storage is stayed in ladle, tightly
Then the molten steel after preliminary removal of impurities is transferred in LF stoves and is refined, due to having carried out preliminary removal of impurities, so also using slag making
Former is more efficient, and after the refining of LF stoves, the impurity level contained in molten steel is lower；Then using in intermediate ladle again
Impurity elimination is handled, and reaches the impurity content in molten steel reaching minimum, is avoided impurity from entering condensation in crystallizer together with molten steel, is contained
There is the toughness of the steel billet of uneven impurity from the inside to the outside small, is unfavorable for later stage finishing；Dummy bar just starts to produce in conticaster
When play a part of pull first block of steel billet；After liquid molten steel condenses in a crystallizer, dummy bar pulls out steel billet from below,
The prelude of continuous casting is pulled open simultaneously；Steel billet enters two cold-zones, to steel billet spray cooling water in the secondary cooling road, by steel billet
To it gradually be cooled to center from appearance, enters withdrawal straightening machine along roller-way, the rear of withdrawal straightening machine is cutting machine, is cut by cutting machine
Obtain the steel billet of different length.
The present invention is further, before the step S1, also proceeds as follows：It will be in tundish before baking of tundish
Residual foreign cleans up, and ladle seals long nozzle using argon.
Through the above technical solutions, avoiding the impurity remained in tundish, contain in the molten steel to be come by ladle transfer
There is impurity, and when containing preparing steel billet in crystallizer there are two types of the molten steel of impurity, the physical characteristic of steel billet can be more influenced, simply
For, mainly the content height of sulphur phosphorus influences the impact flexibility of steel billet, since toughness is a comprehensive embodiment of intensity and plasticity,
So the practical application to steel plays a decisive role.
The present invention is further, and the electrode in LF stoves is provided with lifting gear, and the lifting gear includes being vertically arranged in
The screw rod of LF furnace interiors, the elevator for being threadedly connected to screw rod, wears elevator and the two at the driving mechanism of drive screw turns
In the gag lever post being slidably matched；Electrode in LF stoves is fixedly installed in elevator.
Through the above technical solutions, general electrode upper is arranged in LF furnace interiors, needing to decline it when export license makes
It can continue to work, if due between electrode and LF stove bells sealing it is bad, vacuum systems are not readily reachable by stove, simultaneously
Inside is difficult to achieve the purpose that specific aim reduction-oxidation metal there are the reducing agent that oxidizing gas is then added；The technical program will be electric
Pole is located at LF furnace interiors, and lifting electrode is carried out in inside, then is not easy to influence the leakproofness of bell, so improving in reduction furnace
The purpose of oxidized metal.
The present invention is further, and the arcuate structure to raise up is set as among tundish bottom, the arcuate structure
Recess is formed with reject chute downwards for both sides；The bottom of tundish is provided with two groups of argon gas blowing devices, blowing argon gas described in two groups fills
Setting in tundish bottom close to the both sides in centre position, and argon gas blowing device blowing argon gas direction described in two groups is towards both sides；In
Between the structure of ladle and tundish, shape all same.
Through the above technical solutions, tundish is between ladle and crystallizer, receive the molten steel from ladle, and to knot
Brilliant device shunting plays the role of decompression, current stabilization, slagging-off, Chu Gang shuntings, uniform temperature and ingredient, will be set as upward among it
The arcuate structure of protrusion can will enter the two of the trickling tundish of the waste residue in tundish by the arcuate structure with molten steel
Side, and reject chute then is used to store the effect of waste residue, achievees the purpose that collect convenient for staff；Argon gas blowing device blowing argon gas energy
If enough avoiding that the position in bottom close to both sides is arranged, the waste residue by sinking is easy under the active force of argon gas, is easy again
It is secondary to be mixed into molten steel, to affect the quality of product；And the technical program is that two groups of argon gas blowing devices are located at centre
Bottom is wrapped close to the both sides in centre position, and argon gas blowing device blowing argon gas direction described in two groups is towards both sides, therefore can will
Waste residue is blown downwards so that waste residue flows to both sides by middle part, is flowed in reject chute after being then deposited on arcuate structure, and avoids growing
Phase is mixed into molten steel.
The present invention is further, and tundish overhead gas is collected, and is introduced into before withdrawal straightening machine to will by insulating tube
The steel billet stretched is heated.
Through the above technical solutions, on the one hand making its toughness improve heating steel billet, in order to which withdrawal straightening machine stretches steel billet；
In addition, being quenched in a previous step to steel billet using cooler, hardness is larger, therefore uses and heat back
Fire improves the toughness of steel billet to a certain extent.
The present invention has the following advantages that compared to conventional modules forging：The hardness from the inside to the outside of steel ingot adds than more uniform
Heat-treated sturcture conversion in work technique is relatively simple, and metallographic structure is finer and smoother uniformly；More prominent advantage is the material heart
Dense structure of portion, and its surface toughness and center toughness deviation are minimum, the utility value finished is big；In addition, processing week
Phase shortens, cost reduction.
Specific implementation mode
It is processed below by way of group is formulateeed and implemented, and is tested for the property comparison,
Embodiment 1, a kind of processing technology of steel ingot, the technique include the following steps：
Step S1, iron compound raw material is melted in electric furnace, opens the slide gate nozzle of ladle bottom in electric furnace；
Step S2, molten steel flows into tundish from ladle；
Step S3, the slide gate nozzle of tundish bottom is opened when the molten steel face in tundish reach a certain height, and is made
Molten steel is flowed into the LF furnace refinings containing synthesis slag charge and deoxidier (electrode wherein in LF stoves protrudes from the outside of bell),
Under reducing atmosphere, by electrode submerged arc slag making, the processing of desulfurization, the deoxidation of molten steel is completed；
Step S4, the slide gate nozzle for opening LF stoves, is transferred again into intermediate ladle by molten steel and carries out Slag treatment；
Step S5, molten steel is flowed into the crystallizer of Forced water cooling；
Step S6, when Mold face reach a certain height and molten steel surrounding has been frozen into certain thickness base
Shell；Step S7, start withdrawal straightening machine to bite dummy bar and move down, because molten steel coheres together therefore molten steel is drawn out crystallization with dummy bar
Device；
Step S8, steel billet enters two cold-zones, because the very thin inside of green shell is molten steel therefore water-spraying control；
Step S9, enter withdrawal straightening machine along roller-way, the effect of withdrawal straightening machine is to stretch continuous casting billet, in order to the next step into
Row；
Step S10, the steel billet solidified completely is cut into the desired length through aligning.
Embodiment 2, a kind of processing technology of steel ingot, difference from example 1 is that, before the step S1,
Also proceed as follows：Residual foreign in tundish is cleaned up before baking of tundish, ladle seals long nozzle using argon.
Embodiment 3, a kind of processing technology of steel ingot, the difference is that, the electrode in LF stoves is provided with embodiment 2
Lifting gear, lifting gear include the screw rod for being vertically arranged in LF furnace interiors, the driving mechanism of drive screw turns, are threadedly coupled
In screw rod elevator, to wear elevator and the two be in the gag lever post being slidably matched；Electrode in LF stoves is fixedly installed in lifting
Block, to facilitate installation, cross bar can be fixed on elevator, electrode is vertically installed on cross bar.Driving mechanism is setting
The output shaft of inversion motor on the outside of LF stoves, motor is fixedly connected with driving gear, and driving gear engagement is provided with driven tooth
Wheel, driven gear are fixedly connected with screw coaxial；Driven gear is located in LF stoves, and driving gear is socketed with shell, motor it is defeated
Shaft wears shell and the two is rotatably assorted in sealing；It is not led in addition, driving gear and driven gear are high-temperature resistance plastice
Electric gear, when furnaceman LF makees, driving motor drives driving gear rotation to drive driven gear rotation, and then screw rod rotates, and rises
Drop block driving electrodes decline, after pass through driving motor reverse operation driving electrodes rise.
Embodiment 4, a kind of processing technology of steel ingot the difference is that, are arranged with embodiment 3 among tundish bottom
For the arcuate structure to raise up, recess is formed with reject chute downwards for the both sides of the arcuate structure；It is set in the bottom of tundish
Two groups of argon gas blowing devices are equipped with, argon gas blowing device described in two groups is located at tundish bottom close to the both sides in centre position, and two groups
Argon gas blowing device blowing argon gas direction is towards both sides；The structure of intermediate ladle and tundish, shape all same.
Embodiment 5, a kind of processing technology of steel ingot the difference is that, tundish overhead gas are received with embodiment 4
Collection, and be introduced into before withdrawal straightening machine by insulating tube and the steel billet that will be stretched is heated.
Embodiment 6, a kind of processing technology of steel ingot, with embodiment 5 the difference is that, by insulating tube by hot steam
The steel billet that will be stretched is heated before being introduced into withdrawal straightening machine.
Embodiment 7, a kind of processing technology of steel ingot the difference is that, are arranged with embodiment 4 in the bottom of tundish
There are two groups of argon gas blowing devices, argon gas blowing device described in two groups is located at tundish bottom close to the both sides in centre position, and two groups of institutes
State argon gas blowing device blowing argon gas direction both sides upward.
In the chemical composition of the steel ingot used in embodiment 1-7 the mass percent of each main alloy element for：C is
0.45%, Si 0.25%, Mn 0.70%, Cr 0.25%, P 0.020%, S 0.020%, Ni 0.20%, Cu are
0.15%, surplus Fe.
Embodiment 8-9, using the processing technology of embodiment 6, but each main alloy element in the chemical composition of steel ingot
Mass percent is：Embodiment 8, C 0.42, Si 0.18%, Mn 0.60%, Cr 0.25%, P 0.025%, S are
0.025%, Ni 0.25%, Cu 0.25%, surplus Fe；Embodiment 9, C 0.50%, Si 0.35%, Mn are
0.80%, Cr 0.20%, P 0.020%, S 0.021%, Ni 0.22%, Cu 0.20%, surplus Fe.
For steel ingot of the present invention after above-mentioned smelting and hot-working and heat treatment, final finished specification is (long * wide * are thick)
2000mm*1200mm*400mm modules, sampling are tested for the property, and test following performances：
Product property characterization one, the yield strength value of Examples 1 to 9 is measured using yield strength testing machine, when test, works as dynamometry
For the constant force that the pointer of scale stops operating for the first time as yield strength value, record result is as shown in Table 1；
Product property characterization two records result such as table using the tensile strength of 1~9 forging of tensile testing machine testing example
Shown in lattice 1；
Product property characterization three, Examples 1 to 9 forging is immersed in the salpeter solution of 0.1mg/ml, stands 30d, observes forging table
The corrosion condition in face, extent of corrosion (as reference with crackle and etch pit) formulate≤100 grades, and 100 grades, to do most serious, record
As a result as shown in Table 1.
The performance parameter of 1 implementation group of table
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of steel ingot, which is characterized in that the mass percent of each main alloy element is in the chemical composition of the steel billet：C
For 0.42~0.50%, Si be 0.18~0.35%, Mn it is 0.60~0.80%, Cr≤0.25%, P≤0.025%, S≤0.025%,
Ni≤0.25%, Cu≤0.25%, surplus Fe.
2. a kind of steel ingot according to claim 1, which is characterized in that each major alloy member in the chemical composition of the steel ingot
Element mass percent be：C is 0.45%, Si 0.25%, Mn 0.70%, Cr 0.25%, P≤0.020%, S≤0.020%,
Ni is 0.20%, Cu 0.15%, surplus Fe.
3. a kind of processing technology of steel ingot as claimed in claim 2, which is characterized in that the technique includes the following steps：
Step S1, iron compound raw material is melted in electric furnace, opens the slide gate nozzle of ladle bottom in electric furnace；
Step S2, molten steel flows into tundish from ladle；
Step S3, the slide gate nozzle of tundish bottom is opened when the molten steel face in tundish reach a certain height, and is made
Molten steel is flowed into the LF furnace refinings containing synthesis slag charge and deoxidier, under reducing atmosphere, by electrode submerged arc slag making,
Complete the processing of desulfurization, the deoxidation of molten steel；
Step S4, the slide gate nozzle for opening LF stoves, is transferred again into intermediate ladle by molten steel and carries out Slag treatment；
Step S5, molten steel is flowed into the crystallizer of Forced water cooling；
Step S6, when Mold face reach a certain height and molten steel surrounding has been frozen into certain thickness base
Shell；
Step S7, start withdrawal straightening machine to bite dummy bar and move down, because molten steel coheres together therefore molten steel is drawn out knot with dummy bar
Brilliant device；
Step S8, steel billet enters two cold-zones, because the very thin inside of green shell is molten steel therefore water-spraying control；
Step S9, enter withdrawal straightening machine along roller-way, the effect of withdrawal straightening machine is to stretch continuous casting billet, in order to the next step into
Row；
Step S10, the steel billet solidified completely is cut into the desired length through aligning.
4. processing technology according to claim 3, which is characterized in that before the step S1, also proceed as follows：
Residual foreign in tundish is cleaned up before baking of tundish, ladle seals long nozzle using argon.
5. processing technology according to claim 4, which is characterized in that the electrode in LF stoves is provided with lifting gear, described
Lifting gear includes the screw rod for being vertically arranged in LF furnace interiors, the driving mechanism of drive screw turns, is threadedly connected to screw rod
Elevator, to wear elevator and the two be in the gag lever post being slidably matched；Electrode in LF stoves is fixedly installed in elevator.
6. processing technology according to claim 5, which is characterized in that be set as the arc to raise up among tundish bottom
Shape structure, recess is formed with reject chute downwards for the both sides of the arcuate structure；The bottom of tundish is provided with two groups of blowing argon gas
Device, argon gas blowing device described in two groups is located at tundish bottom close to the both sides in centre position, and argon gas blowing device described in two groups
Blowing argon gas direction is towards both sides；The structure of intermediate ladle and tundish, shape all same.
7. processing technology according to claim 6, which is characterized in that collect tundish overhead gas, and pass through heat preservation
Pipe heats the steel billet that will be stretched before being introduced into withdrawal straightening machine.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117683968A (en) * | 2024-02-02 | 2024-03-12 | 北京科技大学 | Tundish plasma heating desulfurization method |
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| CN1174896A (en) * | 1996-04-29 | 1998-03-04 | 克罗索·洛利工业责任有限公司 | Low alloy steel for manufacture of moulds for plastics |
| CN101376948A (en) * | 2007-08-27 | 2009-03-04 | 宝山钢铁股份有限公司 | Low-cost high-purity medium carbon bearing steel for automobile hub and manufacturing method thereof |
| CN101602104A (en) * | 2009-04-17 | 2009-12-16 | 陈红良 | A kind of tundish and use this tundish to remove the method for nonmetal impurities |
| CN101623700A (en) * | 2009-08-10 | 2010-01-13 | 广州珠江钢铁有限责任公司 | Method for producing medium-carbon steel hot-rolled steel sheet |
| CN104087853A (en) * | 2014-07-03 | 2014-10-08 | 南京钢铁股份有限公司 | Special steel band for shoe material and manufacturing method of steel band |
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| CN117683968A (en) * | 2024-02-02 | 2024-03-12 | 北京科技大学 | Tundish plasma heating desulfurization method |
| CN117683968B (en) * | 2024-02-02 | 2024-04-23 | 北京科技大学 | Tundish plasma heating desulfurization method |
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